Home / 15,356.39-21,188.39-8,981.28

Finding the Fourth Proportional to 15,356.39, 21,188.39 and 8,981.28

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Solution

The fourth proportional to 15,356.39, 21,188.39 and 8,981.28 is: 12,392.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,356.39 : 21,188.39 = 8,981.28 : x
  2. Step 2: Convert to fraction form
    15,356.39/21,188.39 = 8,981.28/x
  3. Step 3: Cross multiply
    15,356.39x = 21,188.39 × 8,981.28
  4. Step 4: Simplify right side
    15,356.39x = 190,298,818.43
  5. Step 5: Solve for x
    x = 190,298,818.43/15,356.39
  6. Step 6: Final answer
    x = 12,392.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.